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Re: Base Plate design

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I have the Blodgett book and the AISC Design guide.  Both references do not discuss a column base subjected to Moment with uplift forces.  (When i say uplift, i mean that the axial force on the column is tension, or Pu = -60 K)

For instance, if my uplift is large in combination with a smaller moment, there may not be any compression force on the baseplate.  All bolts will be in tension, but one side of the anchor rods will be in higher tension loads than the other due to the moment.

Now, what if you have a large uplift, and a large moment, where you have a little compression on the baseplate, etc. 

With these conditions, i don't think that the the _expression_ for 'Y' (the length of plate in compression) is applicable.

I hope you can understand my question.  if you need an example, how would you design a baseplate for Pu= -60K with Mu = 130 k-ft?

Thanks for your responses...

Andy Heigley, PE



Micayas, Julius wrote:

Andy,

 

I got one good reference for you from AISC titled: Steel Design Guide Series 1

 

Column Base Plate

By: John T. DeWolf

 

Some Practical Aspects of Column Base Selection

David T. Ricker

 

This is a publication combined issue by the AISC and the Berlin Steel Company, Inc.

 

Engr. Julius Micayas

P.E. license no.32969

Project Manager/Sr Lead Structural engineer

River Consulting LLC

111 Veterans Memorial Boulevard

               Suite 1600

Metairie, Louisiana 70005

Phone - 504-841-3014 (direct)

504 837-5275 (office)

Fax - 504-837-2986

E-mail: jmicayas(--nospam--at)riverconsulting.com

W-page:            www.riverconsulting.com


From: Gary Loomis [mailto:gloomis(--nospam--at)MasterEngineersinc.com]
Sent: Thursday, February 28, 2008 7:46 AM
To: seaint(--nospam--at)seaint.org
Subject: RE: Base Plate design

 

Yes, Blodgett “Design of Welded Structures”  is probably one of the best.  And it is relatively cheap $10.00.

 

Gary W. Loomis, P.E., Senior Structural Engineering

Master Engineers and Designers, Inc.

-----Original Message-----
From: Andy Heigley [mailto:aheigley(--nospam--at)jgaeng.com]
Sent: Thursday, February 28, 2008 8:30 AM
To: SEAINT
Subject: Base Plate design

 

Hello all:

I'm looking for any references for designing column base plates where the column base is subjected to uplift and a large moment.

The AISC design guide does not discuss a column base with moment in combination with uplift.

Does anybody have any references for such a design?

Thanks in advance,


-- 
Andry Heigley, PE
 
 
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